package org.shiro.serialize;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * @author HKC
 * FastJsonRedisSerializer：序列化成json字符串
 */
public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {
  public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

  private Class<T> clazz;

  static {
    ParserConfig.getGlobalInstance().addAccept("org.shiro.entity");
  }

  public FastJsonRedisSerializer(Class<T> clazz) {
    super();
    this.clazz = clazz;
  }

  @Override
  public byte[] serialize(T t) throws SerializationException {
    if (null == t) {
      return new byte[0];
    }
    return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
  }

  @Override
  public T deserialize(byte[] bytes) throws SerializationException {
    if (null == bytes || bytes.length <= 0) {
      return null;
    }
    String str = new String(bytes, DEFAULT_CHARSET);
    return (T) JSON.parseObject(str, clazz);
  }
}
